Cancer Diagnosis by Measuring Polyisoprenylated Methylated Protein Methyl Esterase Activity

Abstract

Methods for cancer diagnosis, making decisions on appropriate cancer treatment, awareness of a predisposition to cancer and potential cancer prevention, and monitoring of cancer therapy by measuring the activity of PMPMEase.

What is claimed is: 
     
         1 . A method for detection of cancer in a biological sample comprising the step of assaying the biological sample for PMPMEase activity, wherein the biological sample is from prostate, colon, or liver tissue and the method is used to detect prostate, colon, or liver cancer. 
     
     
         2 . The method of  claim 1  wherein PMPMEase activity is PMPMEase enzymatic activity or level of PMPMEase. 
     
     
         3 . The method of  claim 1  further comprising the step of comparing the PMPMEase activity in the biological sample to PMPMEase activity in a non-cancerous biological sample. 
     
     
         4 . The method of  claim 2  wherein the level of PMPMEase is determined by an immunological method. 
     
     
         5 . The method of  claim 1  wherein the assaying step comprises incubating the biological sample with a PMPMEase substrate and measuring a change in concentration of the substrate or a product known to be produced by PMPMEase from the substrate. 
     
     
         6 . The method of  claim 5  wherein the substrate or product concentration is compared against a standard curve. 
     
     
         7 . The method of  claim 5  wherein the substrate is L-N-(4-nitrobenzoyl)-S-trans, trans-farnesyl-cysteine methyl ester (RD-PNB). 
     
     
         8 . A method for detection of prostate cancer in a biological sample comprising the step of assaying the biological sample for PMPMEase activity. 
     
     
         9 . The method of  claim 8  wherein PMPMEase activity is PMPMEase enzymatic activity or level of PMPMEase. 
     
     
         10 . The method of  claim 8  further comprising the step of comparing the PMPMEase activity in the biological sample to PMPMEase activity in a non-cancerous biological sample. 
     
     
         11 . A method for detection of colon cancer in a biological sample comprising the step of assaying the biological sample for PMPMEase activity. 
     
     
         12 . The method of  claim 11  wherein PMPMEase activity is PMPMEase enzymatic activity or level of PMPMEase. 
     
     
         13 . The method of  claim 11  further comprising the step of comparing the PMPMEase activity in the biological sample to PMPMEase activity in a non-cancerous biological sample. 
     
     
         14 . A method for detection of liver cancer in a biological sample comprising the step of assaying the biological sample for PMPMEase activity. 
     
     
         15 . The method of  claim 14  wherein PMPMEase activity is PMPMEase enzymatic activity or level of PMPMEase. 
     
     
         16 . The method of  claim 14  further comprising the step of comparing the PMPMEase activity in the biological sample to PMPMEase activity in a non-cancerous biological sample.